The star closest to Lieyang was a giant star. When its light poured down, more than two-thirds of Lieyang's Main Star was directly illuminated. Compared to other planets, Lieyang's daylight lasted much longer.
Before they had broken free of their planet's gravitational shackles and entered the universe, they could be said to have suffered greatly under the sunlight.
In Lieyang Civilization, the character "hun" carried the meaning of a sphere.
The ancient Lieyang People believed the sky was round, shaped like an eggshell. The stars and celestial bodies in the sky were pellets embedded in that shell, while Lieyang's Main Star was the yolk. From atop that yolk, people could observe their respective positions.
Later, to more conveniently observe changes in celestial positions—or, more precisely, to identify the patterns behind stars raining down heavenly fire—the wise ancient Lieyang People developed an instrument called the "Armillary Sphere."
The structure of the Armillary Sphere was not complicated. An octagonal base supported it, a metal axis stood at the very center, and several concentric rings rested at the top of that axis.
The concentric rings could be opened and assembled into a spherical shape. The outermost ring was fixed along the north-south direction and was called the "Meridian Ring." The ring fixed in the middle ran parallel to Lieyang Star's equatorial plane and was called the "Equatorial Ring." The innermost rings could rotate around the metal axis and were called the "Right Ascension Ring."
Using this simple and primitive instrument, they observed stellar changes, allowing Lieyang to seek fortune and avoid disaster. Thus, the flame of their civilization endured.
As technology continued to advance, tradition-bound Lieyang did not discard the "Armillary Sphere." Instead, it upgraded and modified it on that foundation. By the God-Making Era, Lieyang had even erected the Heavenly Dao Tower,